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Hi,<br />
<br />
Use the following commands :<br />
<br />
[abhishekc@abhishekc ~]$ cat /proc/cpuinfo | grep processor ( For number of Virtual processor )<br />
processor &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 0<br />
processor &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 1<br />
<br />
[abhishekc@abhishekc ~]$ cat /proc/cpuinfo | grep &quot;physical id&quot; ( For number of Physical CPU )<br />
physical id &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 0<br />
physical id &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 0<br />
<br />
Note : 0 means 1 Physical CPU and so on.<br />

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In Solaris:<br />
# psrinfo -p
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Solaris 9 added the -p option to psrinfo to distinguish between physical processors and cores. UltraSPARC IV and IV+ CPU's have two cores per processor - psrinfo and psrinfo -v will display each core as a processor, possibly leading to confusion. psrinfo -vp will help clear this up.
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<div class="content wysiwyg-content">
Is there any way to calculate the amount of physical CPUs a Unix Box possesses or LINUX and<br />
Solaris..
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Is there any way to calculate the amount of physical CPUs a Unix Box possesses or LINUX and
Solaris..

Hi,

Use the following commands :

[abhishekc@abhishekc ~]$ cat /proc/cpuinfo | grep processor ( For number of Virtual processor )
processor	: 0
processor	: 1

[abhishekc@abhishekc ~]$ cat /proc/cpuinfo | grep &quot;physical id&quot; ( For number of Physical CPU )
physical id	: 0
physical id	: 0

Note : 0 means 1 Physical CPU and so on.


Solaris 9 added the -p option to psrinfo to distinguish between physical processors and cores. UltraSPARC IV and IV+ CPU&#39;s have two cores per processor - psrinfo and psrinfo -v will display each core as a processor, possibly leading to confusion. psrinfo -vp will help clear this up.

physical cpu

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.

Unix OS

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).

Linux Distributions

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Kernel and system programming is the process of creating the software necessary for a computer or device to function and operate other programs. Some operating systems (such as Microsoft Windows) are proprietary, but others, such as the various Linux distributions, are open source.